Eric Shea....found that rotor info finally, On Club site Options

[r_towle]

Take a look here.
Three rotors...I knew I was not nuts.

http://www.914club.com/bbs2/index.php?showtopic=250740

Rich

[Eric_Shea]

Very useful information. That's what I suspected. Thanks for taking the time to clear this up. Practical applications:

You want to run a rotor with a centering ring on your early car (found a pair of late Fuchs?) - Use late model calipers and rotors.

You want the deeper pad depth of the later caliper on your early car (longer lasting for racing or street applications) - Again, use the late model caliper and rotor combo.

You want to run the lightweight Brembo calipers without the spacers on your later car - Use the early rotor.

You want to run 911 Fuchs on your 914 and simply stud the rotor (slightly less expensive than studding the rotor and machining off the centering ring) - Early Calipers and Rotors. It might be more initially to purchase the early calipers but after you change out rotors a couple of times, that cost would be realized.

Thanks again Rich.